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D( x )
x < 0
x <= 0
x < 0
x <= 0
x in (0:+oo)
x^(3/2)*(ln(x)/4) = 0
x^(3/2) = 0
1*x^(3/2) = 0 // : 1
x^(3/2) = 0
x = 0
ln(x)/4 = 0
1/4*ln(x) = 0 // : 1/4
ln(x) = 0
ln(x) = ln(e^0)
x = e^0
x = 1
x^(3/2)*(ln(x)/4) = 0 <=> x^(3/2) = 0 or x^(3/2)*(ln(x)/4) = 0 <=> ln(x)/4 = 0
x in { 0}
x = 1
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